Acus Sound Engineering is an Italian audio company based in Recanati, founded and run by the Canale family. The brand focuses on amplification for acoustic instruments, with its combo amplifiers, cabinets, and electronics designed and produced in-house in Italy. Its product philosophy centers on reproducing the natural tone of acoustic sources — flat-top and classical guitars, bowed strings, voice, and hand percussion — rather than coloring them the way electric-guitar amps do.

The core catalog is organized around the One ForStrings combo line, which spans compact practice-sized units like the One ForStrings 5 and 5T up through the larger 6T, 8, and the flagship AD. The lineup also includes the One ForStrings Cremona, voiced specifically for violin, viola, and classical guitar, and the battery-powered One ForStreet aimed at buskers and mobile performers. Alongside the combos, Acus offers the AllAround active-speaker series for small-PA use and a range of dedicated acoustic preamps, along with accessories and replacement parts.

The amplifiers are a common sight in acoustic, jazz, gypsy-jazz, and classical circles, and the brand has built a reputation among players who prize a transparent, low-coloration sound for amplified acoustic instruments. Acus also runs an endorser program called Acus Music Life.

Acus has 8 products cataloged on Equipboard, including Combo Guitar Amplifiers.